Freezing Point

Hi, Milkfans

The freezing point of milk is used to detect added water. As you should know water freezes at 0° C and because milk has some salts and lactose that are in solution the freezing point of milk is slightly lower than water – to the point of about a half a degree Celsius.
In fact for the test, the freezing point of milk should fall between -0.512° C and -0.550° C. If it is closer to zero water is added and if it lies beyond -0.550° C the milk is either going sour or solids, like whey powder was added.

Kind regards,
Leon the Milkman